#include<stdio.h>
void main()
{
    int x;
    printf(" Input number:");
    scanf('%d',&x);
    printf("number of decimal form:%d\n",x);
    printf("    it's binary form:");
    printb(x,sizeof(int)*8);
    putchar("\n");
}
printb(x,n)
int x,n;
{
    if(n>0)
    {
        putchar('0'+((unsigned)(x&(1<<(n-1))))>>(n-1));
        printb(x,n-1);

    }
}